The drive train system consists of propel drive shafts and seals, axle shafts and seals, hunger bearings and differentials.
Axle shafts and propel drive shafts are part of the system that enables the wheels to rotate. One end of the axle shaft is connected to the transmission and the other end is connected to the wheel. The transmission rotates the axle shafts which rotate the wheels. The differential has three jobs, to aim the engine power at the wheels, to act as the final gear reaction in the vehicle, slowing down the rotational speed of the transmission one final time before it hits the wheels and last to transmit the power to the wheels while allowing them to rotate on turns.